vernon98034

<p>Yesterday when I was in a garden, I noticed that the auto-focus of my old Sigma 105 micro lenses was not working. I thought I need to contact Sigma service department to find out whether they could fix the problem or not (they couldn't fix the same problem on my old 17-35mm lenses). Today, I check the lenses again and find the auto-focus problem only occurs in a close distance inside of their close focus distance specfication. The auto-focus works sometimes, but have a difficulty of performance consistently in a close distance. And my another old 70-200mm Sigma lesnes exhibits the same behaviour while their latest 24-35mm and 20mm lesnes don't have this behaviour. I am wondering other people also experience the problem or not. My 6D has the latest firmware on. </p>

<p>I need to reset my 6D Wi-Fi setting at least for the password. After selection "Enable" for the Wi-Fi and click the set button for Wi-Fi function on the camera menu, I get a menu list with Exit and Confirm set. I can't see how I can reset my Wi-Fi setting in the "Confirm Set". Do I miss something in the regard? </p>

<p>Thanks Ian for your input. A very good analysis. A delay of the second flash can be a reason. The meter only has three modes: ambi, cord and non-cord, but multiple flash. So, I only can meter the first flash triggered. The wall colour is light blue. I put a close to grey colour shirt on top of a black reflector and place them in front of the wall. The histogram looks about right this time. The shirt is close to properly exposed with a litter bit overexposure. I used to set the aperture based on the main screen. 4.09 (set 4.0) in this case, but not where the aperture needle point to 5.6 in this case. That would cause the overexposure too. </p>

<p>The light meter is Konica Minolta Auto Meter V F. Monolat sold the light meter business a few years ago. The current version of this meter is <a href="http://www.bhphotovideo.com/c/product/514614-REG/Kenko_KFM_1100_KFM_1100_Auto_Digi_Meter.html">this one</a>.</p>

<p>I don't know how to attach a photo image to a post. So, I upload related photos to my profile. The light set up are shown in <a href="/photo/18190599">this photo</a> and <a href="/photo/18190600">this one</a>. And<a href="/photo/18190618"> this one (ISO400 1/125 F8)</a> and<a href="/photo/18190619"> this one (ISO80 1/125 F8.0</a>) show the whole light source. <a href="/photo/18190601">This photo</a> shows the meter reading. When my camera setting is the same as what the meter reading says, that is ISO400 1/125 F5.6, the histogram of the photo goes straight to the right edge. Again, the meter is pointed to the light source, but not to the wall.<br /> <br /> The purpose of this test is to ensure that I can set up my camera based on my light meter reading.</p>

<p>My light meter show was in the non-cord mode, which is for flash metering without a connection between the meter and a flash. And the meter show 100 percent of light from a flash, or zero percent from ambient light. To my knowledge, all photo light meters in the market can meter both ambient light and flash light.</p>

<p>I have two hostshoe flash lights pointing to a reflective umbrella type of a light modifier. One of the flashes is connected with a light trigger slave and the other is either in a slave mood or connected with the first flash through a shoe connector. The light modifier points to a white wall. I place a light meter against the wall and in the center of the light coverage. The metering dome faces to the light modifier. If I set my camera aperture as the light meter reading, a phone is way too hot and I need to step down two stops to get a proper exposure. Why the light meter reading is so low? BTW, the two flashes are old ones and they don't go pre-flash.</p>

<p>All my Canon film cameras have the eye control feature for a focus point selection. So, I expected the same feature from a Canon DSLR body. To my surprised, I don't get the feature from a Canon DSLR camera. I get quite frustrating the auto focus point selection on 6D. And that lets me wonder why Canon DSLR camera doesn't come with the eye control anymore. </p>